Princess Luna sets up the greatest prank in Equestrian history. She bribes her sister's most trusted doctor to tell Celestia that she has a few days to live. After finding this out, Celestia is determined to live life to the fullest.

Over a thousand years before the mare known as Twilight Sparkle freed Princess Luna from her dark alter ego, Nightmare Moon, Luna felt alone, and abandoned, just like her night. When a nighttime wandering combined with poor decision making leads to a mare's death, Princess Luna must accept responsibility for her actions.